<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="a.html" method=post">
        用户名:<input type="text" name="username" value="1"><br>
        密码:<input type="password" name="password"><br>
      提交按钮<input type="submit" value="登录"/>
      重置按钮<input type="reset" value="清空"/>
      <br>

       性别: <input type="radio" name="sex" value="男">男
            <input type="radio" name="sex" value="女" checked>女</input>
            <br>
            爱好：
            <input type="checkbox" name="hobby" value="篮球" checked>篮球
            <input type="checkbox" name="hobby" value="足球">足球
            <input type="checkbox" name="hobby" value="乒乓球">乒乓球</input>
            <input type="checkbox" name="hobby" value="冰球">冰球</input>
            <input type="checkbox" name="hobby" value="排球">排球</input>
            <br>
            <input type="hidden" name="userId" value="2233"/>
            城市：
            <select name="city">
                <option value="北京">北京</option>
                <option value="上海">上海</option>
                <option value="广州">广州</option>
                <option value="深圳">深圳</option>
                </select>
                <select name="sport">
                    <option value="swimming">游泳</option>
                    <option value="running">跑步</option>
                    <option value="shooting" selected="selected">射击</option>
                    <option value="skating">溜冰</option>
                    </select>
<br>
<input type="file"><br>
               个人简介 <textarea ></textarea> <br>
               个人简介  <textarea name="intro" style="width: 300px;">123</textarea>
    </form>
</body>00000
</html>